Green onions, also known as scallions or spring onions, are a versatile and tasty addition to any garden. They’re easy to grow, require little space, and can provide you with a continuous harvest throughout the growing season. Growing green onions from seed is simple and rewarding, whether you’re gardening in containers, raised beds, or a small outdoor plot. Follow these easy steps for a plentiful supply of fresh green onions right from your own garden.

Step 1: Choose the Right Variety

There are different types of green onions, so it’s helpful to pick the one that best suits your gardening needs. Here are a few popular varieties:

  • Evergreen Bunching: A classic, hardy variety that produces flavorful green stalks and doesn’t form large bulbs, making it ideal for bunching.
  • White Lisbon: A fast-growing, popular variety with a mild flavor, perfect for salads and garnishes.
  • Parade: Known for its tender, upright green stalks, this variety is excellent for repeated harvesting.

Once you have your seeds, you’re ready to start planting!

Step 2: Sow Seeds Directly or Start Indoors

Green onions can be sown directly into the soil or started indoors. Both methods work well, but direct sowing is often easier and faster.

  1. Timing: If sowing outdoors, plant seeds in early spring as soon as the soil can be worked. For indoor starts, plant seeds 6-8 weeks before the last frost date.
  2. Containers: If starting indoors, use seed trays or small pots with good drainage.
  3. Soil: Use a well-draining, loose soil or potting mix rich in organic matter.
  4. Sowing Depth: Sow seeds about 1/4 inch deep and cover lightly with soil.
  5. Spacing: Scatter seeds about an inch apart or sow in rows spaced 6-8 inches apart. Green onions don’t need much room, so they’re great for small spaces.

Step 3: Water and Maintain

Green onions are relatively low-maintenance but need consistent moisture to thrive.

  • Watering: Keep the soil consistently moist but not waterlogged. Water gently so seeds don’t wash away.
  • Light: Green onions need full sunlight to grow well. If growing indoors, place them in a sunny window or use a grow light.
  • Thinning: Once seedlings reach about 2 inches tall, thin them out to about 1-2 inches apart. Thinning helps each plant have enough space and nutrients to grow.

Step 4: Fertilize and Mulch

Although green onions don’t require heavy feeding, a bit of fertilizer and mulch can help them grow healthier and tastier.

  • Fertilizing: Apply a balanced, all-purpose fertilizer once every few weeks. A light side-dressing of compost around the plants is also helpful.
  • Mulching: Adding a thin layer of mulch around the base of the plants helps retain moisture and keeps weeds at bay.

Step 5: Harvesting Green Onions

One of the best things about green onions is that they can be harvested multiple times throughout the growing season. Here’s how to make the most of your harvest:

  1. When to Harvest: Green onions are ready to harvest when they reach about 6-8 inches in height. You can harvest earlier if you prefer smaller, more tender onions.
  2. Harvesting Technique: Use scissors or a sharp knife to cut the green tops about an inch above the soil. This allows the plant to continue growing, providing you with a continuous harvest.
  3. Replant or Regrow: For a truly continuous harvest, you can leave a few onions in the soil to regrow or sow new seeds every few weeks.

Step 6: Pest and Disease Prevention

Green onions are hardy and not usually affected by many pests, but it’s good to take preventive steps:

  • Onion Flies: To prevent onion flies, plant green onions in a well-draining area and avoid over-watering.
  • Companion Planting: Plant green onions near carrots, beets, or lettuce to help repel pests. Green onions make great companion plants, as they deter pests naturally.
  • Fungal Issues: To prevent fungal diseases, water at the base of the plant rather than over the leaves. Good air circulation and spacing help keep fungal issues to a minimum.

Step 7: Storing and Using Your Harvest

Green onions are best when used fresh, but they can be stored for later use as well.

  • In the Fridge: Place harvested green onions in a jar with a little water and cover the tops with a plastic bag. Store in the fridge for up to a week.
  • Freezing: For long-term storage, chop green onions and freeze them in airtight containers or freezer bags. They can be added directly to dishes without thawing.
  • In Water: Keep green onions in a glass of water on the windowsill, and they’ll continue to grow fresh green tops for a few weeks.

Final Tips for Success

Growing green onions from seed is one of the easiest ways to enjoy a fresh, continuous harvest throughout the year. Here are some final tips:

  • Succession Planting: For a steady supply, sow new seeds every 2-3 weeks during the growing season.
  • Grow Indoors Year-Round: Green onions can be grown indoors on a sunny windowsill, providing you with fresh greens even in winter.
  • Experiment with Different Varieties: Try growing both bunching types and bulbing onions for variety in the kitchen.

With these easy steps, you’ll have a reliable supply of green onions to enjoy in salads, soups, and more. Growing them from seed is simple, cost-effective, and a great way to bring fresh flavor to your meals.

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